CN1270664A - Fluidized bed reactor - Google Patents
Fluidized bed reactor Download PDFInfo
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- CN1270664A CN1270664A CN98806951A CN98806951A CN1270664A CN 1270664 A CN1270664 A CN 1270664A CN 98806951 A CN98806951 A CN 98806951A CN 98806951 A CN98806951 A CN 98806951A CN 1270664 A CN1270664 A CN 1270664A
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- gas
- bed reactor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
A fluidized bed reactor including in its lower part a furnace section having a bed of fluidized solid particles, the furnace section being delimited by side walls such as external side walls and/or partition walls and a bottom grid, and a supplying device for introducing gas, e.g. secondary air, into the furnace section at a level above the bottom grid, the supplying device including a gas source chamber, an opening in at least one of the side walls at a level above the bottom grid, and a conduit having a first end connected to the opening and a second end connected to the gas source chamber. The conduit includes a solid flow seal preventing solid particles from flowing backwards from the furnace section into the conduit in a manner preventing or noticeably decreasing introduction of gas from the gas source chamber to the furnace section.
Description
The present invention relates to a kind of fluidized-bed reactor, a burner hearth part that is limited by sidewall and bottom grate is arranged in its bottom and be used for a kind of gas, for example the partial combustion air imports the feeding mechanism in the fluidized bed bed in the above-mentioned burner hearth part.This feeding mechanism comprises a source of the gas chamber, and bellows for example, and at least one nozzle or pipeline that is connected with a opening on the sidewall are so that import above-mentioned burner hearth part with gas from above-mentioned source of the gas chamber.
It is 200-400MWe or above large-size circulating fluidized bed (CFB) boiler that the present invention is specially adapted to thermal efficiency, in this boiler, the bottom of boiler furnace and bottom grate can, for example use the partition component of double-walled, be divided into two or more burner hearth parts.This double-walled partition component can be one and put in the complete baffle wall that reaches another road wall in the stove from one wall that promptly, this double-walled construction can be a continuous or discontinuous wall between the relative furnace wall of twice.In this large-sized boiler, the part air can be by being connected with lateral wall and/or distributing with the feeding mechanism that is connected on the baffle wall member.The baffle wall member of this normally double-walled construction can be used refractory wall one, or the cooling wall that is connected with cooling water recirculation system in the boiler is together made.
The completing combustion of radiating control of optimizing and fuel is two pacing factors of successful chamber design.Therefore, when adding the fluid bed of systemic circulation, must consider these two problems especially.Use in less device, the design that simply scales up is easy to cause can not form good mixing between fuel, combustion air and the fluid bed solids.In addition, this design also can run into the problem that can not form uniform fire box temperature and enough heat transfer area is provided in most preferred scope.All these may influence heat radiation and cause unburnt problem all to require to seek a kind of alternative technical scheme.Comprise in this technical scheme: have the multiple hearth structure of common behind passage, heat transfer plate and/or partition wall partially or completely are set in burner hearth, perhaps the bottom of burner hearth and bottom grate are separated with a double-walled member.
The various technical schemes that the bottom area of fluid bed boiler furnace is separated are disclosed in the prior art.United States Patent (USP) 4,864,944 disclose and a kind ofly with baffle wall fluidized-bed reactor have been separated into the scheme of several portions, have some to be used to allow secondary air enter opening in the reactor in desired mode on the aforementioned barriers wall.The pipeline that has the exhaust port on the differing heights that is connected and leads to baffle wall with air supplies on this baffle wall.Meanwhile, United States Patent (USP) 4,817,563 disclose a kind of fluidized bed plant that is provided with one or more exhaust casings, are provided with the pipeline and the air inlet openings of the separated part that is used to allow secondary air enter the bottom reactor on above-mentioned housing.
United States Patent (USP) 5,370,084 discloses fuel has been blended in various structure in the CFBB that separates effectively, and the pipeline of air being sent into boiler is arranged on inwall at this boiler.United States Patent (USP) 5,215,042 discloses a kind of CFB reactor, it with at least one on top, combustion chamber, vertical, airtight basically dividing plate is separated into several parts to the CFB reactor.This baffle wall has cooling tube, and is provided with at least one pipeline that has distribution ducts, so that combustion air sent into the part that respectively separates.
United States Patent (USP) 4,545,959 disclose a kind of chamber that is used for treatment fluidized bed particulate matter, it comprises one on the bottom of this chamber, the pipeline in cross section triangular in shape, and pipeline respectively upwards on the sidewall of feelings some holes or narrow slit are arranged so that a kind of assist gas in above-mentioned pipeline introducing chamber.
Above-mentioned disclosed document all advises making gas to pass through in the chamber of a baffle wall inflow reactor in the chamber, for example, and in the burner hearth.But, such problem has appearred, and promptly oversize from the length of the pipeline of the chamber introducing spray site in its source air or gas, and can cause very big pressure to fall.This supply line structure commonly used also can go wrong owing to the sieve that returns of solids,, solids occur from burner hearth inflow gas supply line that is, and the pressure that increases whole gas supply pipe falls.When the supply of control gas, the increase that this pressure falls is to be difficult to notice, perhaps is difficult to consider.
Bottom grate nozzle arrangements commonly used, for example those vertically reach the nozzle that the top has been equipped with bubble-cap from the bottom grate, if be installed on the vertical partition plate wall of fluid bed inside, near the very big frictional force of solids layer owing to being subjected to flowing downward the baffle wall will be subjected to serious wearing and tearing.In the burner hearth of fluidized-bed reactor, solids tend to upwards flow at the middle part of each burner hearth part, flow downward along vertical sidewall then.This particle that flows downward enters the bottom of each burner hearth part, when the area of section of each burner hearth part reduces suddenly, just forms strong eddying motion, and this motion may form very strong abrasive forces in the part, for example, and in the zone of secondary air import.In the prior art, do not disclose and prevented that solids from returning sieve and entering gas nozzle or be arranged in ducted know-how measure on the baffle wall.
Therefore, an object of the present invention is to provide the fluidized-bed reactor that a kind of chamber structure has the gas supply device that has improved.
Specific purposes of the present invention provide a kind of improved, are suitable for the gas supply device of large-size circulating fluidized bed (CFB) boiler.
Another specific purposes of the present invention provide a kind of improved, are arranged in the secondary air feeding mechanism on the baffle wall of boiler furnace bottom.
A more concrete purpose of the present invention provides a kind of fluidized-bed reactor with the gas supply device that has improved, and it has reduced the solids of time sieve air inlet body supply line to greatest extent.
Another purpose of the present invention provides a kind of improved gas supply device that has, and has reduced the fluidized-bed reactor of the pressure loss in the gas supply device.
Above-mentioned and other purposes of the present invention are to be reached by a kind of fluidized-bed reactor that is arranged in burner hearth part bottom, and above-mentioned burner hearth part is limited by sidewall and bottom grate, and a kind of feeding mechanism comprises:
A source of the gas chamber, for example bellows;
At least one on above-mentioned at least one sidewall, highly be higher than the bottom grate opening, and
At least one pipeline, one end are connected on above-mentioned at least one opening, and its other end is connected on the above-mentioned source of the gas chamber, so that allow gas flow in the above-mentioned burner hearth part from above-mentioned source of the gas chamber,
And, above-mentioned at least one pipeline comprises that one prevents that solids from partly passing back into solid flow sealing in the above-mentioned at least one pipeline from above-mentioned burner hearth, and its mode is to prevent from or significantly prevent to reduce the above-mentioned gas that flows into from above-mentioned source of the gas chamber in the above-mentioned burner hearth part.
In the large-scale fluidized bed reactor that is divided into some burner hearth parts of separating with the double-walled dividing plate, at least the part of the internal freedom gas compartment between the aforementioned barriers wall, can be according to a preferred embodiment of the present invention, constitute above-mentioned source of the gas chamber or bellows, for above-mentioned burner hearth partly provides secondary air or other gas.On the other hand, if needed, according to another preferred embodiment of the present invention, above-mentioned source of the gas chamber also can form at another position, for example, and at the position that is connected with internal side wall or bottom grate.
Secondary air or other similar gas spray opening by many gases that form usually and flow into the burner hearth part on the sidewall that surrounds above-mentioned burner hearth part.These openings can be arranged to a row on the same vertical height of each road wall, perhaps, if desired, also can be arranged to other shape on some different vertical height of wall.According to the present invention, between each opening and source of the gas chamber, arranged a pipeline, for example a standpipe or a bend pipe flow into the burner hearth part so that allow gas pass through these openings from the source of the gas chamber.
A solid flow sealing is arranged in above-mentioned pipeline, prevent that solids from passing back in the above-mentioned pipeline, so that prevent from or significantly prevent to reduce the gas that flows into the burner hearth part from the source of the gas chamber.In the pipeline near above-mentioned opening part, back and forth flowing of a spot of solids is admissible.Above-mentioned solid flow sealing according to the position of above-mentioned source of the gas chamber, can form with various method.
In a kind of fluidized-bed reactor, above-mentioned source of the gas chamber is to be formed by the space between the baffle wall that constitutes a dividing plate at two on the grate of above-mentioned bottom, usually, all uses the standpipe that is uncovered shape nozzle or the pipeline as secondary air/air.First opening end of above-mentioned standpipe is at the first vertical height l
1The place for example on the height that sprays auxiliary air, is connected with non-opening on the baffle wall, and its second opening end then is being higher than the second vertical height l of first vertical height
2On put in above-mentioned source of the gas chamber.When the vertical height that has a part of source of the gas chamber at least surpasses the jetting height of gas, when for example surpassing the jetting height of auxiliary air, can use this structure.
Above-mentioned standpipe has circular cross sections usually, but, also can be other shapes, for example cross section of flute profile.The vertical length of above-mentioned standpipe, i.e. difference l
2-l
1, must be enough to usually prevent that solids are back to the source of the gas chamber by it from burner hearth part goes.
The lower end of above-mentioned standpipe can be crooked, and it is vertical to make that its lower end can more easily be fixed on, perhaps slightly on the angled side walls member.This standpipe even the bottom of the almost horizontal of one section weak point can be arranged is so that make standpipe leave side wall member.Generally, along on the whole standpipe length, a minimum range or at interval being arranged preferably between sidewall and standpipe, even tilts at sidewall, and during the upper end of close standpipe, also is like this.Another solution makes standpipe tilt slightly exactly.
Above-mentioned standpipe preferably is vertical basically, and but, owing to structural reason, as described above, its part bottom can become with horizontal plane less than 90 degree, is generally about 45 degree, but often is the angle of spending more than or equal to 30.The remainder of standpipe, promptly erect basically on the top of standpipe, becomes the angle more than or equal to 30 degree with horizontal plane.
Be on the position that differs widely in a kind of source of the gas chamber, for example partly or entirely more than above-mentioned grate height or in the following fluidized-bed reactor, for gas is risen to from the source of the gas chamber, for example, the height of secondary air can use another kind of pipeline or nozzle arrangements.According to a preferred embodiment of the present invention, this pipeline of being made by a pipe or similar component has the crooked up and down pipeline that takes the shape of the letter U.On first end of above-mentioned pipeline and the sidewall at the first vertical height l
1On opening connect, second end of this pipeline then with at the 3rd vertical height l
3On, an opening that forms on the lid of above-mentioned source of the gas chamber connects.One section part that is bent upwards is arranged between first and second ends of this pipeline, and this a part of peak is at the second vertical height l
2Height on, this highly is higher than the above-mentioned first and the 3rd vertical height l
1And l
3Above-mentioned first height, promptly the jetting height of auxiliary air generally is higher than the above-mentioned bottom that is in the grate height, or is below or above the 3rd height of above-mentioned grate height.
The vertical length of the standpipe of erectting, perhaps the height relationships of the first of crooked pipeline flows back to the ability of sieve to the solids that prevent of this pipeline.First vertical height and second vertical height, i.e. l
1With l
2Between difference in height Δ l be directly connected to making solids pass through the needed pressure of above-mentioned standpipe, for example, Δ l is big more, standpipe is long more, it is just few more to return the solids of sieve by this pipeline.
Generally, in order to form effective solid stream sealing of the pressure variation that can resist normal burner hearth, vertical difference in height Δ l is approximately 1.0 meters.
As mentioned above, member described above can be used for the fluidized-bed reactor that burner hearth bottom is partly separated by the dividing plate of a double-walled.If desired, this dividing plate can extend to the furnace roof of burner hearth from the bottom grate always, and the chamber of whole burner hearth is divided into two independent parts.The partition wall of this burner hearth has at least one opening on its top, so that allow gas and fluidized bed can the mixing in the horizontal direction in the separated burner hearth part.
The baffle wall of above-mentioned separated furnace bottom, perhaps the partition wall that whole burner hearth is separated into two parts or several parts the panel of handy gelled pipe make, wherein the flow direction of cooling medium is the height from burner hearth bottom, and the water tank that perhaps is lower than burner hearth bottom upwards flows.The cooling tube of baffle wall can perpendicular extend up to the furnace roof of burner hearth, thereby forms partition wall in burner hearth, and above-mentioned these pipes provide extra frigorimeter area in burner hearth.
In the structure of many known fluidized-bed reactors, the pipeline of various different purposes is housed in the inside of double-walled dividing plate, but formed inner space is not utilized as yet but between baffle wall.According to the present invention, if at least a portion of utilizing double-walled dividing plate inside just can correspondingly be saved the space of main furnace chamber grate below as the air in the burner hearth that enters primary air grate top or the bellows of gas.In addition, bellows and air flow into that needed duct length also can reduce to the shortest between the place in the burner hearth, so just can reduce the pressure loss, that is, compare with common structure and can reduce expense.Owing to reduced the pressure loss,, thereby provide more optimal reaction condition for burner hearth inside so the present invention can provide better air to distribute.And, because this structure can prevent that solids from returning sieve and entering double-walled dividing plate inside, so this structure can be protected near the wearing and tearing that are not subjected to the flow solids particle of dividing plate.
Describe in detail of the present invention preferably but only be embodiment with reference to the accompanying drawings, above and other purpose of the present invention, characteristics and advantage will more intactly be understood in order to illustrate.In the accompanying drawing:
Fig. 1 schematically represents the vertical cross section figure according to fluidized-bed reactor first embodiment of the present invention;
Fig. 2 is vertical, the sectional perspective sectional drawing of the fluidized-bed reactor bottom in the presentation graphs 1 schematically;
Fig. 3 schematically represents the vertical cross section figure according to fluidized-bed reactor second embodiment of the present invention;
Fig. 4 is the vertical cross section figure of the fluidized-bed reactor bottom in the presentation graphs 3 schematically; And
Fig. 5 schematically represents to be connected the amplification profile diagram according to a standpipe on the sidewall of the present invention.
Please consult Fig. 1 and Fig. 2 specially, label 10 is represented fluidized-bed reactor on the whole, and it has a burner hearth 12, and the bottom of burner hearth is separated into two burner hearth parts 14 and 16 with a dividing plate 18 with double-walled construction.Dividing plate 18 is the discontinuous dividing plates shown in Fig. 2, and it is by the local dividing plate 18 ' and 18 that can allow solids and gas be separated from the free part 19 in centre that exchanges between burner hearth part 14 and 16 " form.Discontinuous dividing plate shown in Fig. 2 is a kind of solids between burner hearth part 14 and 16 and an example of gas flow paths, other not in the accompanying drawings embodiment of expression comprise: one or a few is by the pipeline of aforementioned barriers wall; The local dividing plate of a double-walled construction; And other members.The fluid bed 20 that solids are arranged in above-mentioned burner hearth 12.This burner hearth has lateral wall 22 and 24, furnace roof 26 and bottom grate 28.Fluidization air or gas pass through grate part 28 ' and 28 from bellows 30 and 32 " flow into burner hearth part 14 and 16.
According to the present invention, nozzle or pipeline 42 and 44 are arranged to two rows on nozzle supported diaphragm or dull and stereotyped 41 in aforementioned barriers space 38 '.Pipeline 42 and 44 is made by the crooked up and down pipe that is configured as U-shaped, and a supporting leg wherein is longer than another.Its short supporting leg 46 of first pipeline, 42 usefulness, i.e. first end of pipeline is at the first vertical height l
1Opening 48 last and on the baffle wall 34 is connected.This short supporting leg 46 extends upward the arrival second vertical height l from opening 48 in dividing plate space 38
2, i.e. the peak of return bend.The long supporting leg 50 of first pipeline 42, i.e. second end of pipeline is at the 3rd height l
3Go up with opening 52 on the nozzle supported diaphragm 41 and be connected, these two openings lead to the dividing plate space 38 between bottom 40 and nozzle supported diaphragm 41 " in the bellows or the source of the gas chamber of formation.Equally, another root crooked pipeline 44 is connected with nozzle supported diaphragm 41 with opening on the baffle wall 36.
Difference in height Δ l equals the first end l of pipeline 42 or 44
2Peak l with this pipeline
1, just and the difference in height between the peak of return bend, that is, and Δ l=l
2-l
1This difference in height is equivalent to the vertical development length of short supporting leg 46 of pipeline, and it has formed the sealing that solids are flowed.So, prevented particle from burner hearth part 14 and 16 upwards in the flow ipe by the pressure of back draught in the formed opposing pipeline of pipeline supporting leg, because it has produced and has influenced the violent pressure that gas flows through pipeline and fall.The sealing that this solids flow has prevented also that solids from returning from burner hearth by whole piece pipeline 42,44 and has been sieved to bellows 38 " in.
Therefore, in the embodiment of Fig. 1 and Fig. 2, opening 48 comprises the pipeline 42 and 44 of first supporting leg 46 and second supporting leg 50,, and bellows 38 " the secondary air feeding mechanism of fluidized-bed reactor formed.
Fig. 3,4 and 5 expression an alternative embodiment of the invention.In these figure, used with Fig. 1 and 2 in identical label.In this embodiment, a dividing plate 18 leads to furnace roof 26 from the bottom grate, whole burner hearth separated into two parts 14 and 16.The sort of discontinuous dividing plate represented as the label among Fig. 2 19 also can be set, or other similar connecting pipes of the solids between burner hearth part 14 and 16 and gas.The lowermost portion of dividing plate 18 comprises two baffle wall 34,36, has formed a pyramidal free gas space 39 between these baffle wall.This baffle wall 34 and 36 and base plate 56 between space 39 as the bellows or the source of the gas chamber of gas supply device.As shown in Figure 4, this source of the gas chamber can be separated into top bellows 39 ' and bottom bellows 39 with a horizontal baffle 54 ".
Above-mentioned base plate 56 is arranged on the height 28 of bottom grate, but it also can be arranged to be higher or lower than above-mentioned height.Because this structure, below the height of grate, between fluidization air bellows 30,32, formed a free gas space 58, this space can be used to place some attached members, otherwise, these members just must be placed on reactor around.Like this, just can more effectively utilize the occupied entire area of reactor.
In the present embodiment, injection pipe the 60, the 62nd is positioned at lower space 39 ", the standpipe that the end directly is open upwards just formed in the space of bellows.The lower end 64 of these standpipes is at vertical height l
1The place is connected with opening 48 on the baffle wall 34,36.The top free end 66 of these pipelines upwards extends in dividing plate space 39, reaches vertical height l
2Height l
1With l
2Between difference in height Δ l formed prevent that make progress flow ipe 60,62 of solids from pricking and flowing into dividing plate space 39 " in the sealing of solid stream.
Air from above-mentioned free gas space or bellows 39 " by pipeline 60,62, flow into hearth portion as auxiliary air and divide in 14 and 16.Air is from bellows 39 " at the upper, open end 66 inflow standpipes 60 and 62 of standpipe, further downwards by this root standpipe, pass through the elbow 63 and the opening 48 of standpipe lower end more then, in the inflow burner hearth.The lower end of standpipe is crooked, so that handle riser is fixed in the opening 48 of the vertical wall 34,36 of integral body better.
Fig. 5 clearly shows a part that is connected a standpipe 60 on the opening that is connected baffle wall 34 more.The lower end 64 of standpipe almost is arranged to horizontal direction, and with respect to the horizontal plane acclivitous angle is spent more than or equal to 30, but less than 90 degree, so that standpipe can leave baffle wall.The top of standpipe or major part 66 almost are vertical, are inclined relative to horizontal β＞45 degree at an angle.
Generally, the pipeline of all auxiliary airs or gas all is arranged to allow air or gas flow on some predetermined height.Yet, also the pipeline that is on the differing heights can be arranged.This pipeline 60 ' and 62 ' (Fig. 4) is used on the height that is higher than pipeline 60 and 62 introduces tertiary air.As shown in Figure 4, the pipeline 60 ' of this tertiary air and 62 ' is arranged in the top 39 ' that separates in free gas space 39.The horizontal baffle 54 that the free gas space is separated into the upper gas space that separates and lower gas space can be controlled the injection of secondary and tertiary air respectively.Vertical partition plate wall (not shown) can be used for further that above-mentioned free gas is spaced apart next, and can control the gas that sprays in the independent burner hearth part 14 and 16 respectively.
Pipeline on the opening that is connected madial wall 22 and 24 can also be arranged.In Fig. 4, represented this pipeline 68.This root pipeline is arranged in the bellows 70 that are connected with madial wall 22.
Though got in touch and thought that so far the most concrete and most preferred embodiment has described the present invention for above, but, should be appreciated that the present invention is not limited in these disclosed embodiment, on the contrary, it should cover various modification and the equivalent in the claims that are included in the application.
Therefore, burner hearth is separated into two parts or more part of large-scale fluidized bed boiler though the present invention has mainly described to have,, the burner hearth reactor that also can be applied to not separate according to this pipeline configuration of the present invention.But, link mutually therewith, above-mentioned standpipe will be connected with the source of the gas chamber with inwall.
Equally, new pipeline configuration of the present invention can certainly be applied to the fluid that other are suitable, the fluid of some auxiliary usefulness for example, and perhaps the mixture of air and fuel is sent in the burner hearth.
Claims (21)
1, a kind of fluidized-bed reactor has in its bottom:
At least one burner hearth part, above-mentioned at least one burner hearth part be by sidewall, for example outside
Sidewall and/or complete or local baffle wall, and a bottom grate encloses
Become, above-mentioned at least one burner hearth part also within it portion the stream of solids is arranged
Change bed, and
Be used for a kind of gas, for example the partial combustion air is above the grate of above-mentioned bottom
Introduce the feeding mechanism at least one burner hearth part on the height, this feeding mechanism bag
Draw together:
A source of the gas chamber, for example bellows;
At least one highly is higher than the opening of bottom grate on above-mentioned at least one sidewall, and
At least one pipeline, the one end is in the first vertical height l
1Be connected on above-mentioned at least one opening, its other end is connected on the above-mentioned source of the gas chamber, so that allow gas flow in the above-mentioned burner hearth part from above-mentioned source of the gas chamber,
Wherein, above-mentioned at least one pipeline comprises that one prevents that solids from sealing from the solid flow that above-mentioned at least one burner hearth partly passes back in the above-mentioned at least one pipeline, and its mode is for preventing or significantly prevent that reducing above-mentioned gas flows in above-mentioned at least one burner hearth part from above-mentioned source of the gas chamber.
2, fluidized-bed reactor as claimed in claim 1 is characterized in that, above-mentioned solid flow sealing is formed by above-mentioned pipeline, and this pipeline has:
One at the second vertical height l
2On peak, this second the height l
2Be higher than
State the first vertical height l
1
3, fluidized-bed reactor as claimed in claim 1 or 2 is characterized in that, above-mentioned feeding mechanism comprises:
On at least one sidewall, be in the many openings on the same vertical height; And
Above-mentioned ducted at least one pipeline is connected with above-mentioned each opening.
4, fluidized-bed reactor as claimed in claim 1 is characterized in that, above-mentioned solid stream movable sealing is formed by at least one pipeline, and this pipeline has:
One indoor at source of the gas, and for example bellows inside is being higher than above-mentioned first vertical height
On second end.
5, fluidized-bed reactor as claimed in claim 2 is characterized in that, above-mentioned second end is at the second vertical height l
2On.
As claim 4 or 5 described fluidized-bed reactors, it is characterized in that 6, above-mentioned pipeline mainly is a upright standpipe, it has the bottom of a bending on the opening that above-mentioned standpipe is connected above-mentioned sidewall.
7, fluidized-bed reactor as claimed in claim 1 is characterized in that, above-mentioned pipeline is a standpipe, and it has:
An acclivitous bottom, axis that this is a part of and above-mentioned horizontal plane form
One more than or equal to 30 the degree, but less than 90 the degree angles, and
A top, the axis on this top and above-mentioned horizontal plane form one greater than 45 degree
Angle.
8, fluidized-bed reactor as claimed in claim 2 is characterized in that:
-above-mentioned second end is at the 3rd vertical height l
3Go up and one that forms above-mentioned source of the gas chamber
Opening on the lid connects,
The part that be bent upwards of above-mentioned pipeline between its first and second ends has peak.
9, fluidized-bed reactor as claimed in claim 8 is characterized in that, above-mentioned source of the gas chamber at least a portion is above the grate of above-mentioned bottom, and above-mentioned first highly be positioned on above-mentioned the 3rd height.
10, fluidized-bed reactor as claimed in claim 1 is characterized in that, above-mentioned solid stream movable sealing is formed by above-mentioned pipeline, and this pipeline has:
Basically first a upright pipe section, its lower end on first vertical height with one
One of above-mentioned at least one opening on the piece sidewall connects;
Basically second a upright pipe section, its lower end on the 3rd vertical height with connect
Be connected on the source of the gas chamber, for example an air distribution plate on the bellows connects; And
The upper end of above-mentioned first and second pipe sections is second hanging down of being higher than above-mentioned first height
Be connected to each other on the straight height.
11, fluidized-bed reactor as claimed in claim 10 is characterized in that, above-mentioned the 3rd vertical height l
3Be lower than the above-mentioned first vertical height l
1
12, fluidized-bed reactor as claimed in claim 1 or 2 is characterized in that:
Above-mentioned fluidized-bed reactor comprises two burner hearth parts, and these two burner hearths partly use one
The piece dividing plate is separated mutually; And
Be used for that gas is introduced above-mentioned burner hearth feeding mechanism partly and be connected aforementioned barriers
On.
13, fluidized-bed reactor as claimed in claim 1 is characterized in that:
Above-mentioned fluidized-bed reactor comprises two hearth portion separating with a dividing plate
Divide, this piece dividing plate is a double-walled construction, by two between them, surround one every
Board space, baffle wall upright or that tilt forms basically, and
Above-mentioned be used to make gas flow in the above-mentioned burner hearth part feeding mechanism and above-mentioned every
Plate connects, and comprises:
-some openings on the aforementioned barriers wall, and
-being arranged in the pipeline in the aforementioned barriers space, these pipelines are with its first end and last
The opening of stating on the baffle wall connects, and connects with its second end and above-mentioned source of the gas chamber
Logical.
14, fluidized-bed reactor as claimed in claim 13 is characterized in that:
A part of dividing plate space between above-mentioned two baffle wall has formed above-mentioned source of the gas
The chamber, and
Above-mentioned pipeline is to be arranged in the indoor standpipe of above-mentioned source of the gas.
15, fluidized-bed reactor as claimed in claim 13 is characterized in that:
The vertical side in aforementioned barriers space is formed by two baffle wall, and its bottom is by one
The nozzle back plate that aforementioned barriers space and above-mentioned source of the gas chamber are separated forms; And
Second end that is arranged in the pipeline of aforementioned barriers interior volume is connected said nozzle
On the opening on the support plate, so that divide supply from above-mentioned source of the gas chamber to above-mentioned hearth portion
Gas.
16, fluidized-bed reactor as claimed in claim 13 is characterized in that, aforementioned barriers is made by cooling surface.
17, a kind of large circulating fluidized bed boiler, it comprises a combustion chamber that is surrounded by sidewall, bottom grate and furnace roof, and above-mentioned sidewall is by cooling surface, and for example finned tube sheet or membrane wall are made, and form the part of the water/steam unit of above-mentioned boiler;
Above-mentioned combustion chamber is by at least one partition wall institute from the above-mentioned furnace roof of bottom grate
Separate, in above-mentioned combustion chamber, formed two or more independent burning portions
Divide, above-mentioned at least one partition wall connected by the water/steam unit with above-mentioned boiler
The cooling surface that connects is made;
The foot of above-mentioned at least one partition wall is made the double-walled part, this double-walled part
Can be continuous or discontinuous, perhaps in above-mentioned independent combustion chamber part
Between solids/gas flow approach is arranged; And
A free gas sky that between the twice wall of above-mentioned double-walled part, forms
Between;
It is characterized in that,
Be provided with secondary in the gas compartment between the twice wall of above-mentioned double-walled part
Air duct, the entrance point of this pipeline is connected with bellows, and its port of export
Be connected with the opening on the twice wall of above-mentioned double-walled part, so as with air from last
Stating bellows introduces in the combustion parts; And
Above-mentioned auxiliary air pipeline comprises a solid flow sealing, prevents to hinder empty
The solids that air-flow is crossed above-mentioned secondary pipeline pass back into from above-mentioned combustion parts
In the above-mentioned pipeline.
18, fluidized-bed combustion boiler as claimed in claim 17 is characterized in that,
Shape in the free gas space of above-mentioned bellows between the twice wall of above-mentioned double-walled
Become;
Above-mentioned pipeline is arranged in the above-mentioned bellows; And
Above-mentioned pipeline mainly is upright standpipe, and these standpipes are such connections
:
Its lower end, i.e. the port of export of above-mentioned air duct is in first vertical height
l
1Opening last and on the double-walled twice wall partly is connected; And
Its upper end is connected with above-mentioned bellows, is above-mentioned air duct on these
Entrance point, and be positioned at and be higher than the second vertical of above-mentioned first vertical height
Height l
2On.
19, fluidized-bed combustion boiler as claimed in claim 18 is characterized in that, the above-mentioned first vertical height l
1With the second vertical height l
2Between difference in height Δ h be approximately 1.0m so that form a kind of hermetically-sealed construction by means of the pressure differential between bellows and the combustion parts.
20, fluidized-bed combustion boiler as claimed in claim 17 is characterized in that,
Above-mentioned free gas space is separated into a top freedom by a horizontal baffle
The gas compartment and free gas space, a bottom;
Auxiliary air pipeline in free gas space, above-mentioned bottom is at first height
One row of openings last and on the aforementioned barriers wall is connected, and,
In the free gas air of above-mentioned top, be provided with pipeline three times, and second
Be connected with a row of openings on the dividing plate on the height.
21, fluidized-bed combustion boiler as claimed in claim 17 is characterized in that, separate with a vertical dividing plate in above-mentioned free gas space.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/888790 | 1997-07-07 | ||
| US08/888,790 US6029612A (en) | 1997-07-07 | 1997-07-07 | Fluidized bed reactor |
| US08/888,790 | 1997-07-07 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101809969A Division CN101158467B (en) | 1997-07-07 | 1998-06-26 | Fluidized bed reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1270664A true CN1270664A (en) | 2000-10-18 |
| CN100351571C CN100351571C (en) | 2007-11-28 |
Family
ID=25393902
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101809969A Expired - Fee Related CN101158467B (en) | 1997-07-07 | 1998-06-26 | Fluidized bed reactor |
| CNB988069512A Expired - Fee Related CN100351571C (en) | 1997-07-07 | 1998-06-26 | Fluidized bed reactor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101809969A Expired - Fee Related CN101158467B (en) | 1997-07-07 | 1998-06-26 | Fluidized bed reactor |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US6029612A (en) |
| EP (2) | EP0995065B1 (en) |
| JP (1) | JP3337229B2 (en) |
| CN (2) | CN101158467B (en) |
| AU (1) | AU7921798A (en) |
| CA (1) | CA2290978C (en) |
| DE (2) | DE69827679T2 (en) |
| ES (2) | ES2186172T3 (en) |
| PL (1) | PL191719B1 (en) |
| WO (1) | WO1999002920A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355780A (en) * | 2017-08-04 | 2017-11-17 | 江联重工集团股份有限公司 | A kind of internal circulating fluidized-bed boiler of multiple hearth structure |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6029612A (en) | 1997-07-07 | 2000-02-29 | Foster Wheeler Energia Oy | Fluidized bed reactor |
| US6237541B1 (en) * | 2000-04-19 | 2001-05-29 | Kvaerner Pulping Oy | Process chamber in connection with a circulating fluidized bed reactor |
| DE10260733B4 (en) * | 2002-12-23 | 2010-08-12 | Outokumpu Oyj | Process and plant for the heat treatment of iron oxide-containing solids |
| DE10260734B4 (en) | 2002-12-23 | 2005-05-04 | Outokumpu Oyj | Process and plant for the production of carbon coke |
| DE10260737B4 (en) | 2002-12-23 | 2005-06-30 | Outokumpu Oyj | Process and plant for the heat treatment of titanium-containing solids |
| DE10260731B4 (en) | 2002-12-23 | 2005-04-14 | Outokumpu Oyj | Process and plant for the heat treatment of iron oxide-containing solids |
| WO2004090021A2 (en) * | 2003-04-02 | 2004-10-21 | Phoenix Technologies International, Llc | Apparatus for treating recycled polyethylene terephthalate containing dense contaminants |
| FI118307B (en) * | 2006-05-18 | 2007-09-28 | Metso Power Oy | Fluidized bed boiler and method for forming a bottom ash cooler for a fluidized bed boiler |
| CN101225954B (en) * | 2008-01-07 | 2010-06-23 | 西安热工研究院有限公司 | Method for supplying secondary air to indent type circulating fluidized bed and device thereof |
| CN101818894B (en) * | 2010-04-29 | 2011-10-26 | 清华大学 | Circulating fluidized bed boiler |
| WO2012008947A1 (en) * | 2010-07-13 | 2012-01-19 | Synthesis Energy Systems, Inc. | Fluidized beds having membrane walls and methods of fluidizing |
| US20140102342A1 (en) * | 2012-10-17 | 2014-04-17 | Babcock & Wilcox Power Generation Group, Inc. | In-bed solids control valve with improved reliability |
| CN102997231B (en) * | 2012-12-31 | 2015-06-24 | 中国科学院工程热物理研究所 | Large circulating fluidized bed boiler, air distribution device and air distribution device assembly |
| CN104344401B (en) * | 2013-08-09 | 2016-09-14 | 中国科学院工程热物理研究所 | Boiler hearth of circulating fluidized bed with variable cross-section water-cooled column |
| US20170356642A1 (en) * | 2016-06-13 | 2017-12-14 | The Babcock & Wilcox Company | Circulating fluidized bed boiler with bottom-supported in-bed heat exchanger |
| EP3624931A1 (en) * | 2017-05-17 | 2020-03-25 | Basell Polyolefine GmbH | Fluidized-bed reactor having multiple recycle gas inlet nozzles |
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| DE3027517A1 (en) * | 1980-07-19 | 1982-02-25 | Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf | Heat exchanger fluidised-bed firing system - has inflow-permitting grate comprising two sets of vertically relatively movable overlapping strips |
| DE3221567A1 (en) * | 1982-06-08 | 1983-12-08 | Bergwerksverband Gmbh, 4300 Essen | Fluidized bed furnace |
| DE3437486A1 (en) * | 1984-10-12 | 1986-04-17 | Cornel. Schmidt GmbH & Co KG, 5090 Leverkusen | Fluidized bed firing |
| FI84855C (en) * | 1986-04-30 | 1992-01-27 | Ahlstroem Oy | Fluidized bed reactor |
| DE3706538A1 (en) * | 1987-02-28 | 1988-09-08 | Metallgesellschaft Ag | Fluidized bed system |
| US4841884A (en) * | 1988-05-26 | 1989-06-27 | A. Ahlstrom Corporation | Distributor plate for fluidized bed reactor |
| DE4005305A1 (en) | 1990-02-20 | 1991-08-22 | Metallgesellschaft Ag | FLUIDIZED LAYER REACTOR |
| FR2681668B1 (en) * | 1991-09-24 | 1997-11-21 | Stein Industrie | BOILER FIREPLACE WITH FLUIDIZED BED CIRCULATING WITH INTERNAL SEPARATION WALL. |
| US5370084A (en) * | 1994-05-26 | 1994-12-06 | Combustion Engineering, Inc. | Pantleg circulating fluidized bed boiler and combustion method using same |
| DE19501504C1 (en) * | 1995-01-19 | 1996-03-21 | Ralf Dipl Ing Paulsen | Plant for burning material in eddy layer |
| US5678497A (en) * | 1996-04-30 | 1997-10-21 | Foster Wheeler Energy International, Inc. | Apparatus for distributing secondary air into a large scale circulating fluidized bed |
| US5836257A (en) * | 1996-12-03 | 1998-11-17 | Mcdermott Technology, Inc. | Circulating fluidized bed furnace/reactor with an integral secondary air plenum |
| US6029612A (en) | 1997-07-07 | 2000-02-29 | Foster Wheeler Energia Oy | Fluidized bed reactor |
-
1997
- 1997-07-07 US US08/888,790 patent/US6029612A/en not_active Expired - Fee Related
-
1998
- 1998-06-26 EP EP98929467A patent/EP0995065B1/en not_active Expired - Lifetime
- 1998-06-26 DE DE69827679T patent/DE69827679T2/en not_active Expired - Fee Related
- 1998-06-26 JP JP50820099A patent/JP3337229B2/en not_active Expired - Fee Related
- 1998-06-26 AU AU79217/98A patent/AU7921798A/en not_active Abandoned
- 1998-06-26 ES ES98929467T patent/ES2186172T3/en not_active Expired - Lifetime
- 1998-06-26 PL PL337896A patent/PL191719B1/en not_active IP Right Cessation
- 1998-06-26 CA CA002290978A patent/CA2290978C/en not_active Expired - Fee Related
- 1998-06-26 EP EP02006367A patent/EP1219896B1/en not_active Expired - Lifetime
- 1998-06-26 CN CN2007101809969A patent/CN101158467B/en not_active Expired - Fee Related
- 1998-06-26 WO PCT/FI1998/000560 patent/WO1999002920A1/en active IP Right Grant
- 1998-06-26 ES ES02006367T patent/ES2233730T3/en not_active Expired - Lifetime
- 1998-06-26 CN CNB988069512A patent/CN100351571C/en not_active Expired - Fee Related
- 1998-06-26 DE DE69808914T patent/DE69808914T2/en not_active Expired - Fee Related
-
1999
- 1999-12-21 US US09/467,924 patent/US6699444B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355780A (en) * | 2017-08-04 | 2017-11-17 | 江联重工集团股份有限公司 | A kind of internal circulating fluidized-bed boiler of multiple hearth structure |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7921798A (en) | 1999-02-08 |
| CN101158467B (en) | 2010-11-03 |
| DE69808914D1 (en) | 2002-11-28 |
| ES2233730T3 (en) | 2005-06-16 |
| PL337896A1 (en) | 2000-09-11 |
| ES2186172T3 (en) | 2003-05-01 |
| CA2290978C (en) | 2005-01-04 |
| US6699444B1 (en) | 2004-03-02 |
| US6029612A (en) | 2000-02-29 |
| EP1219896B1 (en) | 2004-11-17 |
| JP3337229B2 (en) | 2002-10-21 |
| EP1219896A2 (en) | 2002-07-03 |
| CA2290978A1 (en) | 1999-01-21 |
| CN100351571C (en) | 2007-11-28 |
| DE69827679T2 (en) | 2005-12-08 |
| EP1219896A3 (en) | 2002-07-10 |
| DE69808914T2 (en) | 2003-06-18 |
| EP0995065A1 (en) | 2000-04-26 |
| EP0995065B1 (en) | 2002-10-23 |
| WO1999002920A1 (en) | 1999-01-21 |
| DE69827679D1 (en) | 2004-12-23 |
| CN101158467A (en) | 2008-04-09 |
| PL191719B1 (en) | 2006-06-30 |
| JP2001504209A (en) | 2001-03-27 |
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